Which of the following are medical applications of radiation? Select all that apply. cancer therapy detect and locate cancer gen
2 answers:
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Answer:
2000 L
General Formulas and Concepts:
<u>Atomic Structure</u>
- Moles
- Temperature Conversion: K = °C + 273.15
<u>Gas Laws</u>
Ideal Gas Law: PV = nRT
- P is pressure
- V is volume (in L)
- n is number of moles
- R is gas constant
- T is temperature (in K)
Explanation:
<u>Step 1: Define</u>
[Given] 8.8 moles gas
[Given] 0.12 atm
[Given] 56 °C = 329.15 K
<u>Step 2: Solve for </u><em><u>V</u></em>
- Substitute in variables [Ideal Gas Law Formula]:
- Isolate <em>V</em>:
- Multiply/Divide [Cancel out units]:
<u>Step 3: Check</u>
<em>Follow sig fig rules and round. We are given 2 sig figs.</em>
1981.7 L ≈ 2000 L
The question is incomplete, here is the complete question:
Xianming runs a titration and collects, dries, and weighs the produced in the experiment. He reports a mass of 0.2989 g go
Based on this, calculate the concentration of
solution.
<u>Answer:</u> The concentration of barium hydroxide solution is 0.0013 moles.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of barium sulfate = 0.2989 g
Molar mass of barium sulfate = 47.87 g/mol
Putting values in above equation, we get:
The given chemical reaction follows:
By Stoichiometry of the reaction:
1 mole of barium sulfate is produced from 1 mole of barium hydroxide
So, 0.0013 moles of barium sulfate will be produced from = of barium hydroxide
As, no volume of the container is given. So, the concentration will be calculated in moles only.
Hence, the concentration of barium hydroxide solution is 0.0013 moles.